(gnus-article-truncate-lines): Use `truncate-lines'.

lisp/gnus/ChangeLog

 2007-11-22  Stefan Monnier  <monnier@iro.umontreal.ca>
 
+	* gnus-art.el (gnus-article-truncate-lines): Use `truncate-lines'.
+
 	* message.el (message-send-mail-function): Fix error convention.
 	(message-mailer-swallows-blank-line, message-send-mail-with-sendmail)
 	(message-widen-reply, message-send-mail, message-talkative-question)

lisp/gnus/gnus-art.el

@@ -2222,7 +2222,7 @@ unfolded."
 	(mail-header-fold-field)
 	(goto-char (point-max))))))
 
-(defcustom gnus-article-truncate-lines default-truncate-lines
+(defcustom gnus-article-truncate-lines (default-value 'truncate-lines)
   "Value of `truncate-lines' in Gnus Article buffer.
 Valid values are nil, t, `head', `first', `last', an integer or a
 predicate.  See Info node `(gnus)Customizing Articles'."